Episode 102. Topic: What is an ice age? Theme: Climate change. Did you know we are in an ice age right now? What does that mean and then what was the period of glacial coverage 40,000 years ago? 

Episode 101. Topic: The Permian–Triassic extinction event. Theme: Climate change. What was the biggest extinction event in history? What caused it and how does it compare to more recent extinction events? 

Episode 100. Topic: Lead. Theme: Poisons. How does lead poisoning work and how has regulations on lead in paint and gasoline potentially improved society? 

Episode 99. Topic: Carbon monoxide. Theme: Poisons. Why is carbon monoxide dangerous and what does exposure look like? 

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Episode 98. Topic: Botox. Theme: Poisons. How does botox work? Where does this toxin come from and why is it a poison? 

Episode 97. Topic: Mercury. Theme: Poisons. What does Mercury poisoning look like and how has it affected society? 

Episode 96. Topic: Vitamin A. Theme: Poisons. How is vitamin A toxic in large quantities and when might you be exposed to that much? 

Episode 95. Topic: The limits of distillation. Theme: Net neutrality. What is net neutrality and why has it become so popular over the last few years? What are the pros and cons of this philosophy? 

Episode 94. Topic: Cookies and why we accept them. Theme: The internet. Why do websites ask us to accept cookies? What are cookies and why are they one the rise? 

Episode 93. Topic: Y2K. Theme: The internet. Why were we so worried New Year's Eve 1999? Did anything bad actually happen?